Crash Report UUID: f40f8196-aa62-4bc4-957e-a1dfe1e8c2af[11:39:06] [main/FATAL] [minecraft/Main]: Failed to start the minecraft server
net.minecraftforge.fml.LoadingFailedException: Loading errors encountered: [
        Structurize (structurize) has failed to load correctly
§7java.lang.IncompatibleClassChangeError: Inconsistent constant pool data in classfile for class com/ldtteam/structurize/api/blocks/IBlockCollection. Method 'net.minecraft.block.Block lambda$create$0(com.ldtteam.structurize.api.blocks.BlockType)' at index 147 is CONSTANT_MethodRef and should be CONSTANT_InterfaceMethodRef
]
        at net.minecraftforge.fml.ModLoader.waitForTransition(ModLoader.java:263) ~[forge:?] {re:classloading}
        at net.minecraftforge.fml.ModLoader.dispatchAndHandleError(ModLoader.java:230) ~[forge:?] {re:classloading}
        at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:188) ~[forge:?] {re:classloading}
        at net.minecraftforge.fml.server.ServerModLoader.load(ServerModLoader.java:44) ~[forge:?] {re:classloading}
        at net.minecraft.server.Main.main(Main.java:95) ~[?:?] {re:classloading}
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?] {}
        at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
        at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?] {}
        at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:51) ~[forge-1.16.5-36.1.4.jar:36.1] {}
        at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
        at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {re:classloading}
        at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {re:classloading}
        at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63) [forge-1.16.5-36.1.4.jar:?] {}
        at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60) [forge-1.16.5-36.1.4.jar:?] {}
        at net.minecraftforge.server.ServerMain.main(ServerMain.java:57) [forge-1.16.5-36.1.4.jar:?] {}

Can someone help me with this error? Running the the server on a vServer and tried to install the Valhelsia Modpack but it doesnt work.

Greadings Luca.

I don't suppose there is any resolution for this yet? I'm also experiencing this with the new 1.8.0 version of Direwolf20 for 1.16. It doesn't happen with the 1.7 version

Well, I was able to get mine working, so I'll post what worked for me here. Not sure if it's applicable for anyone else. My issue was that I use MultiMC and it was using Java 13 (my default version). Once I specified Java 1.8, the issue went away.